Changing Media Thumbnails

[mildlyjelly]

Oh, yes I see. But this should work:

Code:

.listItemImage.listItemImage-large.itemAction.lazy::before {
    content: "";
    position: absolute;
    top: 0;
    display: block;
    width: 100%;
    height: 100%;
    backdrop-filter: blur(16px);
}